Hiking trails around Seven Rila Lakes, Bulgaria, Europe

hiking trails bulgaria europe nature outdoor adventure mountains landscape summer recreation scenic views trekking exploration travel tourism fitness wildflowers clouded sky lake national park pathways excitement solitude scenic beauty elevation sport fresh air natural surroundings breathtaking vibrant picturesque hiker experience journey environment wanderlust backpacking hills tranquility leisure health active greenery slopes views serenity trailside hiking gear mountainscape elevation gain